EP 1172731 A3 20030129 - Data processing apparatus and integrated circuit
Title (en)
Data processing apparatus and integrated circuit
Title (de)
Datenverarbeitungsgerät und Integrierte Schaltung
Title (fr)
Appareil de traitement de données et circuit intégré
Publication
Application
Priority
JP 2000212815 A 20000713
Abstract (en)
[origin: EP1172731A2] With a view to preventing illicit access and reverse engineering, processing apparatus comprises an internal circuit (100) including a CPU (101), internal devices (102 to 105) and a bus line (110) connecting the CPU (101) to the internal devices (102 to 105) and extending externally, and an external circuit (200) including external devices (201 to 203 and 211 to 212) provided externally of an externally extending portion (110a) of the bus line (110). The internal circuit (100) includes a ciphering section (120) provided at an entrance to an external side and ciphering addresses and data on the bus line (110) by ciphering patterns according to a plurality of regions divided from an address space allotted to the entire external devices. <IMAGE>
IPC 1-7
IPC 8 full level
G06F 12/14 (2006.01); G06F 13/14 (2006.01); G06F 21/00 (2006.01); G06F 21/06 (2006.01); G06F 21/12 (2013.01); G06F 21/14 (2013.01); G06F 21/22 (2006.01); G06F 21/24 (2006.01); G06F 21/60 (2013.01); G06F 21/62 (2013.01); G06F 21/75 (2013.01); G06F 21/86 (2013.01)
CPC (source: EP US)
G06F 12/1408 (2013.01 - EP US); G06F 21/75 (2013.01 - EP US)
Citation (search report)
- [XY] EP 0720098 A1 19960703 - THOMSON CSF [FR]
- [Y] FR 2787216 A1 20000616 - BULL CP8 [FR]
- [Y] US 5488661 A 19960130 - MATSUI MITSURU [JP]
- [Y] WO 9913615 A1 19990318 - INTEL CORP [US], et al
- [X] US 5081675 A 19920114 - KITTIRUTSUNETORN KITTI [US]
- [A] US 5515540 A 19960507 - GRIDER STEPHEN N [US], et al
- [A] US 4573119 A 19860225 - WESTHEIMER THOMAS O [US], et al
- [E] EP 1093056 A1 20010418 - NEC CORP [JP]
- [X] EP 0660215 A2 19950628 - IBM [US]
- [A] WO 0019321 A1 20000406 - KONINKL PHILIPS ELECTRONICS NV [NL], et al
- [AP] DE 19922155 A1 20001123 - GIESECKE & DEVRIENT GMBH [DE]
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1172731 A2 20020116; EP 1172731 A3 20030129; EP 1172731 B1 20040901; DE 60013424 D1 20041007; DE 60013424 T2 20050113; JP 2002032268 A 20020131; JP 4683442 B2 20110518; US 2002029345 A1 20020307; US 7657758 B2 20100202
DOCDB simple family (application)
EP 00311444 A 20001220; DE 60013424 T 20001220; JP 2000212815 A 20000713; US 73983900 A 20001220